nanog mailing list archives
Re: what about 48 bits?
From: Jon Lewis <jlewis () lewis org>
Date: Mon, 5 Apr 2010 16:36:26 -0400 (EDT)
On Sun, 4 Apr 2010, A.B. Jr. wrote:
Hi, Lots of traffic recently about 64 bits being too short or too long. What about mac addresses? Aren't they close to exhaustion? Should be. Or it is assumed that mac addresses are being widely reused throughout the world? All those low cost switches and wifi adapters DO use unique mac addresses?
Since they only really need to be unique per broadcast domain, it doesn't really matter. You can I could use the same MAC addresses on all our home gear, and never know it. For manufacturers, it's probably reasonably safe to reuse MAC addresses they put on 10mbit ISA ethernet cards...if they were a manufacturer back then.
---------------------------------------------------------------------- Jon Lewis | I route Senior Network Engineer | therefore you are Atlantic Net | _________ http://www.lewis.org/~jlewis/pgp for PGP public key_________
Current thread:
- Re: Hubs on a NIC (was:Re: what about 48 bits?), (continued)
- Re: Hubs on a NIC (was:Re: what about 48 bits?) Joe Greco (Apr 08)
- Re: Hubs on a NIC (was:Re: what about 48 bits?) Roland Perry (Apr 08)
- Re: what about 48 bits? Michael Thomas (Apr 07)
- Re: what about 48 bits? Michael Thomas (Apr 07)
- Re: what about 48 bits? Roland Perry (Apr 08)
- Re: what about 48 bits? A.B. Jr. (Apr 04)
- Re: what about 48 bits? Scott Howard (Apr 04)
- Re: what about 48 bits? Larry Sheldon (Apr 04)
- Re: what about 48 bits? Kevin Oberman (Apr 04)
- Re: what about 48 bits? Valdis . Kletnieks (Apr 05)
- Re: what about 48 bits? Patrick W. Gilmore (Apr 05)
- Re: what about 48 bits? Valdis . Kletnieks (Apr 05)
- Re: what about 48 bits? joel jaeggli (Apr 05)
- Re: what about 48 bits? Jon Lewis (Apr 06)
- Re: what about 48 bits? Mark Smith (Apr 04)
- Re: what about 48 bits? Jim Burwell (Apr 04)
- Re: what about 48 bits? Jorge Amodio (Apr 04)